I have purchased a domain name using namecheap. I have hosted the application using netlify. I connected the app hosted on netlify to namecheap using DNS servers that were provided by netlify. In the application is a contact form that sends data to a gmail account. The issue I am having is it affects my ability to send and retrieve emails in gmail. Which host records should I use to connect the domain to the server? Is it CNAME or A records?